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代词one,it,that的用法区别
ne, it, that常常用来代替或避免重复某个名词。例如：
① I'm looking for a flat. I'd really like one with a garden.
② -Where did you find your watch? - I find it in our classroom.
③ The populati on of China is larger tha n that of any other coun try.
ne可指人或物，只替代单数可数名词，复数用 on es. One是泛指，但有限定修
饰语，如the, this, that…修饰就变成了特指。如：
① One must do on e's duty. ② Mary has a red pen cil and Jane has a blue one.
③ The new desig ns are much better tha n the old on es.
3. that只指物，不指人，可替代可数名词或不可数名词，具有“特指”性质。指 的是同类事物中的另一样东西，即同类异物。
女口： The library of our school is bigger than that of yours.（that 代替的是另一个图书 馆。）
4. One和that在代替可数名词时，如果没有前置定语只有后置定语时，the one 和that可互换。但该名词如有前置定语，则只能用 the one而不能用that。例如：
① I will take the seat next to the on e（=that）by the win dow 我就坐窗口的那个座位旁 边。
② I prefer the large box to the small one.（one不可用 that 替换 ）。
5. That的复数形式those代替可数名词的复数。可指人或物，一般后面跟修饰 语。如：
① Today's cellph ones are smaller tha n those（=the on es）used in the past.
② The students who do best in exam are not always those（=the ones） with the best brains.
6. the one（ones或that ,those指代某一名词做定语从句的先行词时，其关系代词 which在that之后，which不能省略，而在the one ones之后,which可省略。女口：
① Their problem today is somewhat similar to that which they faced many years ago.
7. 代替不可数名词时，应该用 that。如：The equipment is different from that